(Warning: The following contains gigantic, hulking SPOILERS for the recently-released Suicide Squad, including the discussion of multiple Easter eggs. Proceed with whatever level of caution that suggests to you is wise...)

Suicide Squad Sure Is Hiding A Whole Lot Of Easter Eggs

Suicide Squad/Warner Bros.

Including bonus metahumans, surprise comic-book henchmen, and a whole lot of nods to the comic-books...

First up?

13. Belle Reve Is Surprisingly Accurately Located

DC Comics

Not only do we see a whole lot of the 'Squad's traditional Louisiana home, Belle Reve, but the DCEU's take on the prison is even in the exact same place as its comic-book counterpart: Terrebonne Parish.

12. Harley Might Just Have Had A Hand In Robin's Death

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It's hard to say exactly what happened, but there's a 'blink-and-you'll miss it' on screen reference to Harley having had a hand in the murder of Jason 'Robin' Todd during her initial introduction. Which means we may finally be edging closer to an actual explanation of what happened to Batman's teen sidekick.

11. We Catch A Glimpse Of The Classic Harley Quinn Costume

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Fans of Alex Ross' work on the cover of the Paul Dini-penned Batman: Harley Quinn (above) will be happy to note that there's an extremely faithful visual reference to the iconic image hiding in the film's opening moments. Fans of Harley Quinn in general, meanwhile (and why wouldn't you be?)...

...will no doubt simply be happy to know that it very much features her original costume.

10. We See More Superheroes Than You'd Think

Justice League/Warner Bros.

Not only do we see Batman take down two of the Squad - with Ben Affleck distinctly visible on both occasions - but we do indeed also see an appearance from The Flash, who notes "No honor among thieves, huh" while taking down a certain Australian boomerang-tosser. Plus, don't forget to keep your eyes peeled after the credits roll.

9. A Fan-Favorite Joker Henchman Makes An Appearance

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One of the film's more unusual nods to the comic-books comes in the form of Jonny Frost, The Joker's driver and henchman from the non-canonical 2008 graphic novel, Joker. He's very much in the movie, though, as played by Jim Parrick...

Suicide Squad/Warner Bros.

...and gets a whole lot more to do than his relatively obscure comic-book origins would suggest.

8. Basketball Fans Were Well Served By The Film

Nike

Let's just say that if you know who Phil Jackson is, and what a Triangle Offense means, then there are a couple of knowing laughs coming your way.

7. Katana's Origin Is Pretty Much Ripped Straight From The Comics

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We don't hear too many details of Katana's origin in the movie, but what we do now know seems to have been taken straight from the page: Her husband was killed with the magic sword she wields, and his soul is trapped within it. Expect any future appearances to arrive complete with an intriguing flashback featuring a treacherous brother and the Yakuza.

6. Slipknot's Fate Was No Surprise To Fans Of The Comic-Book

DC Comics

Anyone who's read the classic 80's Suicide Squad comic-books will, after all, have known exactly what was going to happen to Adam Beach's Slipknot the moment Captain Boomerang told him that their explosive implants were a bluff on Waller's part. After all, the scene had already played out back in 1989's Suicide Squad #9. Only that time, of course, Slipknot only lost an arm.

5. Are The Watchmen Watching?

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One of the film's most topical Easter eggs arrives in the form of the iconic Watchmen smiley face, which can be seen grinning down at Deadshot as he stares at some child-sized mannequins in a shop window. It seems unlikely that we're set to see the Watchmen join the DCEU anytime soon - but heck, a few months ago we'd have all said the same thing about the DC Comics universe, too.

4. The Squad's Comic-Book Creator Gets A Nod

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Keep your eyes peeled while the 'Squad are in Midway City, and you might just spot a building named after the team's comic-book creator John Ostrander. Which, since he penned all 66 issues of the original Suicide Squad run, kind of seems the least the movie could do.

3. Ace Chemicals Makes An Appearance

DC Comics

Not only do we see Harley Quinn's 'birth' in a giant vat of chemicals, but that same sequence seems to confirm at least one element of DC Comics' The Killing Joke as DCEU-canon. After all, why would The Joker have taken Harley to that particular factory, unless he was also 'born' there, as in the ever-controversial Killing Joke?

2. Deadshot's Relationship With Batman

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One of the film's more subtle nods to the comic-books came in its final moments, where Deadshot (in the wake of a sort-of-dream sequence) happily notes that "I killed the Bat", before being told: "No, you don't want that". Which, with the comic-book Deadshot having long had a strange relationship with Batman: Both hating him, and being pathologically unable to kill him. It's definitely a deep cut, but a fun one for fans of the comic-books.

And, finally, of course, there's...

1. The Mid-Credits Sequence

Batman v Superman: Dawn of Justice/Warner Bros.

Which, of course, features Ben Affleck's Bruce Wayne, and his ruthlessly crossover-dangling line: "You should shut it down, or my friends and I will do it for you." Could a Justice League v Suicide Squad movie be on the cards? And, if so, just how in the hell would any of the 'Squad survive the film's opening five minutes?